Understand what a useful backup plan contains and why restore testing matters.
A backup is a separate copy of data that can be used after accidental deletion, hardware failure, corruption or a security incident. Synchronization alone is not always a backup because unwanted changes may be copied immediately.
A practical plan identifies what must be protected, how often copies are created, how long they are kept, where they are stored and who can restore them. The 3-2-1 approach recommends three copies of important data, on two different types of storage, with one copy kept in another location. Encrypt sensitive backups and restrict access.
A backup is useful only if it can be restored. Test recovery regularly, record the result, and check that both files and databases are included. Before major updates, create a verified recovery point. Define acceptable data loss and recovery time so the backup schedule matches the real business need.